<VV> Electric fuel pump

[PETER INMAN]

I`m thinking of changing over to an electric fuel pump in our 65 110 Monza. Parts store has two choices to choose from in regulated pumps, one range is 2-4 lbs. and the next has a range of 4-7 lbs.  Which pump pressure is more suited for the Corvair fuel requirements?
 Also I cant figure out where to search to find out correct wireing, possibly using the Vega three prong pressure switch. Can anyone help me out on this subject? Also stumped on what pressures up fuel before oil press get up as in long periods when you dont run your car.
                              Thank Pete Inman
                               65 110 Monza
                                E Jordan Mi.